What causes P1346 on a Toyota?

Failing bank 1 VVT sensor Sludged oil slowing phaser response (2AZ-FE oil burners take note) Low oil level starving the VVT system Worn timing chain altering the correlation Failing oil control valve

How do I fix P1346 on a Toyota?

Check oil level and condition. Top off a 2AZ-FE first Test the VVT sensor output Command the oil control valve and watch response Check timing chain stretch if correlation is off Service oil or replace the sensor per findings

P1346 Variable Valve Timing Sensor Range/Performance Problem (Bank 1)

Q: What does P1346 mean on a Toyota?

P1346. Variable Valve Timing Sensor Range/Performance Problem (Bank 1). Applies to Camry 2AZ-FE, Corolla, RAV4, Highlander with VVT-i.

Category: Powertrain - Ignition
Severity: Check Engine Light
Applies to: Camry 2AZ-FE, Corolla, RAV4, Highlander with VVT-i

This fault is part of the Toyota VVT-i codes guide. It covers the system and the order to check it.

What does P1346 mean on a Toyota?

P1346. Variable Valve Timing Sensor Range/Performance Problem (Bank 1). This Toyota-enhanced code applies to Camry 2AZ-FE, Corolla, RAV4, Highlander with VVT-i.

Common causes of P1346

Failing bank 1 VVT sensor
Sludged oil slowing phaser response (2AZ-FE oil burners take note)
Low oil level starving the VVT system
Worn timing chain altering the correlation
Failing oil control valve

How to fix P1346

Check oil level and condition. Top off a 2AZ-FE first
Test the VVT sensor output
Command the oil control valve and watch response
Check timing chain stretch if correlation is off
Service oil or replace the sensor per findings

Sources and review

Last updated 2026-09-20.